On Strain Gradients in Plasticity

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F01%3A01066149" target="_blank" >RIV/68407700:21340/01:01066149 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
On Strain Gradients in Plasticity
Original language description
The classical theory of plasticity predicts no size effects and fails to describe localization of plastic strain in a realistic way. A standard way of extending plasticity to get rid of the unwanted features is to enrich the model of elasto-plastic continuum by introducing higher strain gradients, or additional degrees of freedom of the Cosserat type (directors). Customary, the enriched structure of the advanced plasticity theories is related to the density of dislocations arising due to local plastic deformation inhomogeneities. In a detailed analysis of the macroscopic shear bands it is demonstrated that the above mentioned framework can be misleading. Surface observations reveal that a macroshear band on the sample scale is composed of a set of parallel regularly spaced microshear bands. The characteristic distance between micro bands is a base for introducing of physically meaningful higher gradients. The distance is controlled by hardening within the micro bands
Czech name
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Czech description
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Publication year
2001
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of 6th National Congress of Mechanics
ISBN
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ISSN
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e-ISSN
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Number of pages
7
Pages from-to
14-20
Publisher name
Giahoudi-Giapouli
Place of publication
Thessaloniki
Event location
Thessaloniki
Event date
Jul 19, 2001
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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